*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00011819
Feb00110213
Mar02824600274
Apr211142800541
May72917253003177
Jun165723296006035
Jul1810831153002254
Aug111942100451
Sep0243200434
Oct00790079
Nov00170017
Dec001006070
Total549883334618013364